Message-Id: <4831A780.1080909@bv.tum.de> Date: Mon, 19 May 2008 18:14:56 +0200 From: Ralf Schmid User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.4) Gecko/20030619 Netscape/7.1 (ax) To: igsmail@igscb.jpl.nasa.gov Subject: [IGSMAIL-5775]: igs05_1480.atx - New release of the absolute IGS antenna correction file Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 19 May 09:15:06 PDT 2008 Message Number 5775 ****************************************************************************** Author: Ralf Schmid Dear IGS colleagues! The absolute IGS antenna correction file (igs05_wwww.atx) has been updated. The new release is called 'igs05_1480.atx'. It contains 11 additional robot calibrations from Geo++ (http://gnpcvdb.geopp.de/), several of them replacing converted field calibration results used so far. Such a replacement of values is only possible, as the respective antenna types are currently NOT in use within the IGS network and the EUREF Permanent GNSS Network EPN. However, the robot calibrations are important for the ongoing reprocessing efforts, especially as regards the EPN. Users of the respective antenna types outside the IGS are warned that the change of the phase center corrections may cause considerable jumps in time series of station coordinates. The following antenna types are affected: New robot calibrations: TPSCR.G3 TPSH TPSCR3_GGD OLGA TPSCR3_GGD PFAN TRM29659.00 OLGA TRM29659.00 SNOW TRM57971.00 NONE Robot calibrations replacing converted field calibration: LEIAT302-GP NONE LEIAT303 NONE TRM23903.00 NONE TRM33429.20+GP TCWD TRM55971.00 TZGD The update of the antenna correction model is available at ftp://igscb.jpl.nasa.gov/pub/station/general/igs05_1480.atx or ftp://igscb.jpl.nasa.gov/pub/station/general/igs05.atx With best regards, Ralf Schmid on behalf of the IGS Antenna Working Group http://igscb.jpl.nasa.gov/projects/antenna/ Details: 1) LEIAT302-GP NONE calibration replacement; never used within the IGS network; affected EPN station: GSR1 (antenna replaced in the meantime) 2) LEIAT303 NONE calibration replacement; never used within the IGS network; affected EPN stations: CASC (antenna replaced in the meantime), MANS (no longer active) 3) TPSCR.G3 TPSH new calibration; used at IGS and EPN station REYK; EPN uses individual calibration 4) TPSCR3_GGD OLGA new calibration; used at future EPN stations TRF2 and SBG2 5) TPSCR3_GGD PFAN new calibration; used at future EPN station PFA2 6) TRM23903.00 NONE calibration replacement; never used within the IGS network; affected EPN stations: HOBU, TRDS, VARS (antennas replaced in the meantime) 7) TRM29659.00 OLGA new calibration; used at future EPN station HFL2 8) TRM29659.00 SNOW new calibration; might cause consistency problems, if the calibration for the antenna without the radome was used so far; never used within the IGS network; affected EPN stations: BORK (no longer active), HOBU (antenna replaced in the meantime) 9) TRM33429.20+GP TCWD calibration replacement; considerable difference between the robot calibration and the converted field calibration (about 1 cm in zenith direction for L1); the phase center corrections do not refer to the antenna reference point given in antenna.gra (BPA = bottom of preamplifier), but to the bottom of the additional 'dome groundplane'; update of antenna.gra will follow; never used within the IGS network; affected EPN station: BUTE (antenna replaced in the meantime) 10) TRM55971.00 TZGD calibration replacement; affected IGS stations: DUBR, OSJE (observation data was not distributed); affected EPN stations: BUTE, KLOP, ZYWI (individual calibrations used), DUBR, OSJE (observation data was not distributed), MOP2 (individual calibration underway?) 11) TRM57971.00 NONE new calibration